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Seismic Fragility Evaluation of Chimney Structure in Power Plant by Finite Element Analysis

유한요소 해석을 통한 발전소 연돌 구조물의 지진취약도 분석

Kwon, Gyu-Bin;Kim, Jin-Sup;Kwon, Min-Ho;Park, Kwan-Soo
권규빈;김진섭;권민호;박관수

  • Received : 2019.01.08
  • Accepted : 2019.03.06
  • Published : 2019.03.31

Abstract

Seismic research on bridges, dams and nuclear power plants, which are infrastructure in Korea, has been carried out since early on, but in the case of structures in thermal power plants, research is insufficient. In this study, a total of 192 dynamic analyzes were performed for 16 actual seismic waves and 12 PGAs. As a result, the probability of failure increased as the PGA value increased for each applied seismic wave, but it was different for each seismic wave. As a result, at 0.22G, the ratio of the compressive limit reached to the limit state was 25% and the ratio of the relative displacement reached the limit state was 13%. So, the probability of collapse due to compressive failure Is higher. Therefore, the fragility curve of the chimney which is the subject of this study can be used as a quantitative basis to determine the limit state of the target structure when an earthquake occurs and to be used for the safety design of the thermal power plants.

Keywords

Chimney;Fragility Curve;PGA;Seismic Waves;Thermal Power Plants

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Acknowledgement

Supported by : National Research Foundation of Korea(NRF)